./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:27:29,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:27:29,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:27:29,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:27:29,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:27:29,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:27:29,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:27:29,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:27:29,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:27:29,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:27:29,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:27:29,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:27:29,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:27:29,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:27:29,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:27:29,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:27:29,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:27:29,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:27:29,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:27:29,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:27:29,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:27:29,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:27:29,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:27:29,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:27:29,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:27:29,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:27:29,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:27:29,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:27:29,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:27:29,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:27:29,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:27:29,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:27:29,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:27:29,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:27:29,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:27:29,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:27:29,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:27:29,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:27:29,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:27:29,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:27:29,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:27:29,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:27:29,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:27:29,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:27:29,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:27:29,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:27:29,818 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:27:29,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:27:29,818 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:27:29,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:27:29,819 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:27:29,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:27:29,820 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:27:29,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:27:29,825 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:27:29,825 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:27:29,826 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:27:29,826 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:27:29,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:27:29,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:27:29,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:27:29,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:27:29,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:27:29,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:27:29,828 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:27:29,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:27:29,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:27:29,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:27:29,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:27:29,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:27:29,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:29,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:27:29,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:27:29,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:27:29,834 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:27:29,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:27:29,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:27:29,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:27:29,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:27:29,836 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-11-13 02:27:30,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:27:30,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:27:30,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:27:30,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:27:30,134 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:27:30,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-13 02:27:30,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7a8f22f80/aafc8bbf85bf475f9ddce12716dfa911/FLAG1a7b3bbef [2021-11-13 02:27:31,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:27:31,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-13 02:27:31,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7a8f22f80/aafc8bbf85bf475f9ddce12716dfa911/FLAG1a7b3bbef [2021-11-13 02:27:31,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7a8f22f80/aafc8bbf85bf475f9ddce12716dfa911 [2021-11-13 02:27:31,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:27:31,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:27:31,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:31,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:27:31,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:27:31,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:31" (1/1) ... [2021-11-13 02:27:31,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a374e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:31, skipping insertion in model container [2021-11-13 02:27:31,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:31" (1/1) ... [2021-11-13 02:27:31,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:27:31,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:27:32,135 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-13 02:27:32,142 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-13 02:27:32,166 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:27:32,172 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:27:33,140 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,141 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,141 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,142 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,144 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,158 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,159 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,161 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,162 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:33,647 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:27:33,648 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:27:33,650 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:27:33,651 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:27:33,653 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:27:33,654 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:27:33,655 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:27:33,656 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:27:33,658 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:27:33,658 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:27:33,888 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:27:34,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:34,077 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:34,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:34,212 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:27:34,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67740dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:34, skipping insertion in model container [2021-11-13 02:27:34,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:34,213 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:27:34,215 INFO L158 Benchmark]: Toolchain (without parser) took 2551.19ms. Allocated memory was 102.8MB in the beginning and 136.3MB in the end (delta: 33.6MB). Free memory was 59.0MB in the beginning and 91.7MB in the end (delta: -32.7MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2021-11-13 02:27:34,216 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:27:34,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2540.05ms. Allocated memory was 102.8MB in the beginning and 136.3MB in the end (delta: 33.6MB). Free memory was 58.8MB in the beginning and 91.7MB in the end (delta: -32.9MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2021-11-13 02:27:34,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2540.05ms. Allocated memory was 102.8MB in the beginning and 136.3MB in the end (delta: 33.6MB). Free memory was 58.8MB in the beginning and 91.7MB in the end (delta: -32.9MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:27:36,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:27:36,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:27:36,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:27:36,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:27:36,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:27:36,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:27:36,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:27:36,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:27:36,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:27:36,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:27:36,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:27:36,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:27:36,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:27:36,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:27:36,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:27:36,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:27:36,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:27:36,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:27:36,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:27:36,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:27:36,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:27:36,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:27:36,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:27:36,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:27:36,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:27:36,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:27:36,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:27:36,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:27:36,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:27:36,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:27:36,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:27:36,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:27:36,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:27:36,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:27:36,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:27:36,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:27:36,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:27:36,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:27:36,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:27:36,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:27:36,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:27:36,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:27:36,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:27:36,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:27:36,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:27:36,613 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:27:36,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:27:36,614 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:27:36,614 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:27:36,614 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:27:36,615 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:27:36,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:27:36,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:27:36,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:27:36,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:27:36,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:27:36,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:27:36,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:27:36,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:27:36,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:27:36,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:27:36,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:27:36,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:27:36,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:27:36,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:27:36,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:36,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:27:36,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:27:36,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:27:36,622 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:27:36,622 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:27:36,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:27:36,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:27:36,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:27:36,623 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-11-13 02:27:36,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:27:37,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:27:37,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:27:37,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:27:37,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:27:37,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-13 02:27:37,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7b5ed9195/b6770be3c2434930b512c1aea008cb8a/FLAG960e10866 [2021-11-13 02:27:38,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:27:38,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-13 02:27:38,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7b5ed9195/b6770be3c2434930b512c1aea008cb8a/FLAG960e10866 [2021-11-13 02:27:38,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/data/7b5ed9195/b6770be3c2434930b512c1aea008cb8a [2021-11-13 02:27:38,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:27:38,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:27:38,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:38,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:27:38,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:27:38,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:38" (1/1) ... [2021-11-13 02:27:38,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709e6f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:38, skipping insertion in model container [2021-11-13 02:27:38,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:38" (1/1) ... [2021-11-13 02:27:38,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:27:38,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:27:39,050 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-13 02:27:39,057 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-13 02:27:39,088 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:27:39,096 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:27:40,176 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,177 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,177 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,178 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,179 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,209 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,218 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,219 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:40,678 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:27:40,679 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:27:40,680 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:27:40,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:27:40,684 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:27:40,685 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:27:40,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:27:40,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:27:40,687 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:27:40,688 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:27:40,882 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:27:41,043 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,049 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:41,252 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:27:41,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:27:41,320 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-13 02:27:41,320 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-13 02:27:41,323 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:27:41,324 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:27:41,364 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,365 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,365 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,366 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,366 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,372 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,373 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,374 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,374 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:27:41,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:27:41,407 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:27:41,408 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:27:41,409 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:27:41,409 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:27:41,410 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:27:41,410 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:27:41,411 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:27:41,411 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:27:41,431 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:27:41,510 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,511 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:41,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:27:41,585 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-13 02:27:41,586 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-13 02:27:41,587 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 02:27:41,588 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 02:27:41,659 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,659 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,660 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,660 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,661 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,669 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,669 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,670 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,671 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,706 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 02:27:41,708 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 02:27:41,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 02:27:41,709 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 02:27:41,710 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 02:27:41,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 02:27:41,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 02:27:41,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 02:27:41,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 02:27:41,713 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 02:27:41,735 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 02:27:41,802 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,803 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 02:27:41,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:42,357 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:27:42,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42 WrapperNode [2021-11-13 02:27:42,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:42,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:42,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:27:42,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:27:42,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:42,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:27:42,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:27:42,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:27:42,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:27:42,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:27:42,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:27:42,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:27:42,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (1/1) ... [2021-11-13 02:27:42,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:42,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:27:42,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:27:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-13 02:27:42,908 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-13 02:27:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lexical [2021-11-13 02:27:42,909 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lexical [2021-11-13 02:27:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 02:27:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:27:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-13 02:27:42,909 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-13 02:27:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:27:42,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 02:27:42,910 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-11-13 02:27:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-11-13 02:27:42,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:27:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:27:42,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:27:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-13 02:27:42,911 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-13 02:27:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:27:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:27:42,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:27:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-13 02:27:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-13 02:27:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:27:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-13 02:27:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-13 02:27:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:27:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:27:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:27:42,913 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 02:27:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 02:27:42,914 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-13 02:27:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-13 02:27:56,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:27:56,998 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:27:57,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:57 BoogieIcfgContainer [2021-11-13 02:27:57,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:27:57,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:27:57,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:27:57,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:27:57,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:27:38" (1/3) ... [2021-11-13 02:27:57,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d6d68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:57, skipping insertion in model container [2021-11-13 02:27:57,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:42" (2/3) ... [2021-11-13 02:27:57,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d6d68b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:57, skipping insertion in model container [2021-11-13 02:27:57,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:57" (3/3) ... [2021-11-13 02:27:57,011 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lexical_harness.i [2021-11-13 02:27:57,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:27:57,017 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:27:57,076 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:27:57,083 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:27:57,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:27:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-13 02:27:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:27:57,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:57,126 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:57,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash 720675663, now seen corresponding path program 1 times [2021-11-13 02:27:57,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:27:57,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377211027] [2021-11-13 02:27:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:57,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:27:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:27:57,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:27:57,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:28:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:28:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-13 02:28:02,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 02:28:03,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:03,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377211027] [2021-11-13 02:28:03,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377211027] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:03,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:03,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 02:28:03,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812508324] [2021-11-13 02:28:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:03,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:03,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:03,663 INFO L87 Difference]: Start difference. First operand has 149 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:28:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:04,263 INFO L93 Difference]: Finished difference Result 297 states and 443 transitions. [2021-11-13 02:28:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 120 [2021-11-13 02:28:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:04,284 INFO L225 Difference]: With dead ends: 297 [2021-11-13 02:28:04,284 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 02:28:04,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:04,295 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 46 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 437.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 517.83ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:04,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 489 Invalid, 52 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 517.83ms Time] [2021-11-13 02:28:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 02:28:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-13 02:28:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-11-13 02:28:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 202 transitions. [2021-11-13 02:28:04,369 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 202 transitions. Word has length 120 [2021-11-13 02:28:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:04,369 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 202 transitions. [2021-11-13 02:28:04,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 02:28:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 202 transitions. [2021-11-13 02:28:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 02:28:04,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:04,376 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:04,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:04,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:04,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1914357044, now seen corresponding path program 1 times [2021-11-13 02:28:04,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:04,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617066065] [2021-11-13 02:28:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:04,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:04,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:04,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:28:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:09,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:28:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:09,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:09,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:10,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:28:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-13 02:28:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 02:28:11,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:12,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-13 02:28:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-13 02:28:12,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:12,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617066065] [2021-11-13 02:28:12,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617066065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:12,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1530542052] [2021-11-13 02:28:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:12,630 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:12,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:12,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:12,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-13 02:28:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:28:14,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 02:28:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 02:28:15,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1530542052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:15,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:15,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9, 7] total 18 [2021-11-13 02:28:15,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169295944] [2021-11-13 02:28:15,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:28:15,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:28:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:15,948 INFO L87 Difference]: Start difference. First operand 146 states and 202 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 02:28:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:17,139 INFO L93 Difference]: Finished difference Result 238 states and 333 transitions. [2021-11-13 02:28:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:28:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 122 [2021-11-13 02:28:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:17,145 INFO L225 Difference]: With dead ends: 238 [2021-11-13 02:28:17,145 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 02:28:17,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 465 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:28:17,148 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 964.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.88ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1067.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:17,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 752 Invalid, 122 Unknown, 0 Unchecked, 12.88ms Time], IncrementalHoareTripleChecker [30 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 1067.29ms Time] [2021-11-13 02:28:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 02:28:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-13 02:28:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 87 states have (on average 1.206896551724138) internal successors, (105), 89 states have internal predecessors, (105), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-11-13 02:28:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 200 transitions. [2021-11-13 02:28:17,174 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 200 transitions. Word has length 122 [2021-11-13 02:28:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 200 transitions. [2021-11-13 02:28:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 02:28:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 200 transitions. [2021-11-13 02:28:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-13 02:28:17,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:17,180 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:17,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:17,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:17,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:17,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:17,594 INFO L85 PathProgramCache]: Analyzing trace with hash 875575230, now seen corresponding path program 2 times [2021-11-13 02:28:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:17,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249477534] [2021-11-13 02:28:17,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:28:17,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:17,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:17,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:28:21,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 02:28:21,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:28:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:28:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-13 02:28:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-13 02:28:22,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:22,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249477534] [2021-11-13 02:28:22,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249477534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:22,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:22,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-13 02:28:22,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337473228] [2021-11-13 02:28:22,956 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:22,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:28:22,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:28:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:28:22,958 INFO L87 Difference]: Start difference. First operand 146 states and 200 transitions. Second operand has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-13 02:28:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:23,253 INFO L93 Difference]: Finished difference Result 158 states and 219 transitions. [2021-11-13 02:28:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:28:23,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) Word has length 126 [2021-11-13 02:28:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:23,259 INFO L225 Difference]: With dead ends: 158 [2021-11-13 02:28:23,259 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 02:28:23,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:28:23,261 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 22 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.73ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:23,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1729 Invalid, 64 Unknown, 0 Unchecked, 11.73ms Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 185.82ms Time] [2021-11-13 02:28:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 02:28:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-13 02:28:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 96 states have internal predecessors, (111), 47 states have call successors, (47), 12 states have call predecessors, (47), 14 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-11-13 02:28:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 216 transitions. [2021-11-13 02:28:23,286 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 216 transitions. Word has length 126 [2021-11-13 02:28:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:23,287 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 216 transitions. [2021-11-13 02:28:23,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 5.0) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-13 02:28:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 216 transitions. [2021-11-13 02:28:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:28:23,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:23,292 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:23,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:23,511 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -16578938, now seen corresponding path program 1 times [2021-11-13 02:28:23,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:23,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084556960] [2021-11-13 02:28:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:23,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:23,517 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:23,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:28:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:28:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:28,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:28:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-13 02:28:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 02:28:29,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-13 02:28:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-13 02:28:30,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:30,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084556960] [2021-11-13 02:28:30,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084556960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:30,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017338644] [2021-11-13 02:28:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:30,930 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:30,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:30,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 02:28:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:32,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:28:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 02:28:33,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-13 02:28:33,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017338644] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:33,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:33,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 9, 7] total 18 [2021-11-13 02:28:33,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315413872] [2021-11-13 02:28:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:33,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:28:33,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:28:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:33,680 INFO L87 Difference]: Start difference. First operand 155 states and 216 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 02:28:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:34,678 INFO L93 Difference]: Finished difference Result 303 states and 433 transitions. [2021-11-13 02:28:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:28:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 130 [2021-11-13 02:28:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:34,683 INFO L225 Difference]: With dead ends: 303 [2021-11-13 02:28:34,683 INFO L226 Difference]: Without dead ends: 185 [2021-11-13 02:28:34,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 497 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:28:34,685 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 76 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 832.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 919.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:34,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 857 Invalid, 113 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 919.95ms Time] [2021-11-13 02:28:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-13 02:28:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-13 02:28:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 109 states have (on average 1.201834862385321) internal successors, (131), 112 states have internal predecessors, (131), 60 states have call successors, (60), 13 states have call predecessors, (60), 15 states have return successors, (73), 59 states have call predecessors, (73), 59 states have call successors, (73) [2021-11-13 02:28:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 264 transitions. [2021-11-13 02:28:34,714 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 264 transitions. Word has length 130 [2021-11-13 02:28:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:34,715 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 264 transitions. [2021-11-13 02:28:34,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-13 02:28:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 264 transitions. [2021-11-13 02:28:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:28:34,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:34,718 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:34,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:34,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-13 02:28:35,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:35,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1086480213, now seen corresponding path program 1 times [2021-11-13 02:28:35,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:35,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644052744] [2021-11-13 02:28:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:35,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:35,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:35,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:28:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:28:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:39,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:28:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:28:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-13 02:28:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:28:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:42,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-13 02:28:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:28:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 02:28:42,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:42,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644052744] [2021-11-13 02:28:42,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644052744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:42,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1957931096] [2021-11-13 02:28:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:42,180 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:42,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 02:28:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 02:28:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 102 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 02:28:55,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-13 02:29:00,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1957931096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:00,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677873604] [2021-11-13 02:29:00,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:00,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:00,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:00,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 02:29:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 02:29:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:29:02,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 02:29:05,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-13 02:29:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-13 02:29:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-11-13 02:29:05,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-13 02:29:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 02:29:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-13 02:29:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 02:29:10,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-13 02:29:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:29:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 02:29:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 02:29:18,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677873604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:18,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:29:18,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 14, 9, 15, 13] total 41 [2021-11-13 02:29:18,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412070267] [2021-11-13 02:29:18,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:18,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 02:29:18,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 02:29:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1518, Unknown=1, NotChecked=0, Total=1640 [2021-11-13 02:29:18,906 INFO L87 Difference]: Start difference. First operand 185 states and 264 transitions. Second operand has 41 states, 38 states have (on average 4.921052631578948) internal successors, (187), 37 states have internal predecessors, (187), 17 states have call successors, (97), 10 states have call predecessors, (97), 12 states have return successors, (93), 14 states have call predecessors, (93), 17 states have call successors, (93) [2021-11-13 02:29:21,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:23,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:25,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:27,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:29,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:31,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:33,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:35,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:37,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:39,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:41,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:43,339 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:45,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:40,201 INFO L93 Difference]: Finished difference Result 598 states and 897 transitions. [2021-11-13 02:30:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 02:30:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 4.921052631578948) internal successors, (187), 37 states have internal predecessors, (187), 17 states have call successors, (97), 10 states have call predecessors, (97), 12 states have return successors, (93), 14 states have call predecessors, (93), 17 states have call successors, (93) Word has length 132 [2021-11-13 02:30:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:40,209 INFO L225 Difference]: With dead ends: 598 [2021-11-13 02:30:40,209 INFO L226 Difference]: Without dead ends: 354 [2021-11-13 02:30:40,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 728 SyntacticMatches, 36 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=750, Invalid=8179, Unknown=1, NotChecked=0, Total=8930 [2021-11-13 02:30:40,216 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 366 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 365 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60024.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 6894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.12ms SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 64363.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:40,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 2385 Invalid, 6894 Unknown, 0 Unchecked, 70.12ms Time], IncrementalHoareTripleChecker [365 Valid, 5208 Invalid, 13 Unknown, 1308 Unchecked, 64363.07ms Time] [2021-11-13 02:30:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-13 02:30:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 288. [2021-11-13 02:30:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 172 states have (on average 1.1744186046511629) internal successors, (202), 178 states have internal predecessors, (202), 93 states have call successors, (93), 17 states have call predecessors, (93), 22 states have return successors, (133), 92 states have call predecessors, (133), 92 states have call successors, (133) [2021-11-13 02:30:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 428 transitions. [2021-11-13 02:30:40,290 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 428 transitions. Word has length 132 [2021-11-13 02:30:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 428 transitions. [2021-11-13 02:30:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 4.921052631578948) internal successors, (187), 37 states have internal predecessors, (187), 17 states have call successors, (97), 10 states have call predecessors, (97), 12 states have return successors, (93), 14 states have call predecessors, (93), 17 states have call successors, (93) [2021-11-13 02:30:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 428 transitions. [2021-11-13 02:30:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:30:40,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:40,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:30:40,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-13 02:30:40,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:40,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:40,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:40,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:30:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1964176643, now seen corresponding path program 1 times [2021-11-13 02:30:40,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:30:40,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373669782] [2021-11-13 02:30:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:40,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:30:40,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:30:40,915 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:30:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:30:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:45,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:30:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:48,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:30:48,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-11-13 02:30:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 02:30:48,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-13 02:30:51,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:30:51,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373669782] [2021-11-13 02:30:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373669782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:51,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1377281292] [2021-11-13 02:30:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:51,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:30:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:30:51,143 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:30:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:30:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:30:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-13 02:30:54,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-13 02:30:55,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1377281292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:30:55,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:30:55,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [12, 7] total 21 [2021-11-13 02:30:55,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254832701] [2021-11-13 02:30:55,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:30:55,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:30:55,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:30:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:30:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:30:55,283 INFO L87 Difference]: Start difference. First operand 288 states and 428 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-13 02:30:57,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:30:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:59,965 INFO L93 Difference]: Finished difference Result 569 states and 864 transitions. [2021-11-13 02:30:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:30:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2021-11-13 02:30:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:59,974 INFO L225 Difference]: With dead ends: 569 [2021-11-13 02:30:59,974 INFO L226 Difference]: Without dead ends: 288 [2021-11-13 02:30:59,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 548 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:30:59,978 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 22 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3546.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 3790.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 860 Invalid, 110 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 37 Unchecked, 3790.65ms Time] [2021-11-13 02:30:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-13 02:31:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-13 02:31:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 178 states have internal predecessors, (201), 93 states have call successors, (93), 17 states have call predecessors, (93), 22 states have return successors, (133), 92 states have call predecessors, (133), 92 states have call successors, (133) [2021-11-13 02:31:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 427 transitions. [2021-11-13 02:31:00,027 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 427 transitions. Word has length 145 [2021-11-13 02:31:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:00,028 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 427 transitions. [2021-11-13 02:31:00,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-11-13 02:31:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 427 transitions. [2021-11-13 02:31:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:31:00,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:00,033 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:31:00,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:00,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:00,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:31:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1263112065, now seen corresponding path program 1 times [2021-11-13 02:31:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:31:00,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956831854] [2021-11-13 02:31:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:00,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:31:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:31:00,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:31:00,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:31:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:31:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:08,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:31:08,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 99 treesize of output 35 [2021-11-13 02:31:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 02:31:08,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-11-13 02:31:11,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:31:11,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956831854] [2021-11-13 02:31:11,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956831854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:11,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2103478700] [2021-11-13 02:31:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:11,147 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:31:11,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:31:11,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:31:11,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:31:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:16,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 02:31:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 02:31:22,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-13 02:31:25,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2103478700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:25,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998457002] [2021-11-13 02:31:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:25,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:25,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:25,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 02:31:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:31:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 126 proven. 10 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 02:31:32,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-13 02:31:34,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998457002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:34,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:31:34,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 15, 9, 14, 9] total 24 [2021-11-13 02:31:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426025545] [2021-11-13 02:31:34,808 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:34,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 02:31:34,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:31:34,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 02:31:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:31:34,809 INFO L87 Difference]: Start difference. First operand 288 states and 427 transitions. Second operand has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-13 02:31:37,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:39,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:41,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:43,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:31:45,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:32:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:10,941 INFO L93 Difference]: Finished difference Result 539 states and 791 transitions. [2021-11-13 02:32:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 02:32:10,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) Word has length 145 [2021-11-13 02:32:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:10,946 INFO L225 Difference]: With dead ends: 539 [2021-11-13 02:32:10,947 INFO L226 Difference]: Without dead ends: 346 [2021-11-13 02:32:10,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 814 SyntacticMatches, 40 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:32:10,951 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 287 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 137 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25146.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.97ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 27475.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:10,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1192 Invalid, 2474 Unknown, 0 Unchecked, 22.97ms Time], IncrementalHoareTripleChecker [137 Valid, 1531 Invalid, 5 Unknown, 801 Unchecked, 27475.87ms Time] [2021-11-13 02:32:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-13 02:32:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 299. [2021-11-13 02:32:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 181 states have (on average 1.138121546961326) internal successors, (206), 188 states have internal predecessors, (206), 93 states have call successors, (93), 18 states have call predecessors, (93), 24 states have return successors, (116), 92 states have call predecessors, (116), 92 states have call successors, (116) [2021-11-13 02:32:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 415 transitions. [2021-11-13 02:32:10,994 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 415 transitions. Word has length 145 [2021-11-13 02:32:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:10,995 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 415 transitions. [2021-11-13 02:32:10,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.130434782608695) internal successors, (141), 23 states have internal predecessors, (141), 6 states have call successors, (48), 5 states have call predecessors, (48), 7 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2021-11-13 02:32:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 415 transitions. [2021-11-13 02:32:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:32:10,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:10,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:11,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:11,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-13 02:32:11,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 02:32:11,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:11,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1766253824, now seen corresponding path program 1 times [2021-11-13 02:32:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:11,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141521539] [2021-11-13 02:32:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:11,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:11,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:11,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:32:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1980 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 02:32:15,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:24,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:32:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 215 [2021-11-13 02:32:24,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:32:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 207 [2021-11-13 02:32:24,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:32:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 207 treesize of output 175 [2021-11-13 02:32:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 151 proven. 3 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 02:32:25,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 219 [2021-11-13 02:32:56,921 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-13 02:32:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 219 treesize of output 1 [2021-11-13 02:32:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-13 02:32:57,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:57,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141521539] [2021-11-13 02:32:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141521539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:57,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170185066] [2021-11-13 02:32:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:57,069 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:32:57,070 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:32:57,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 02:32:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1980 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:32:58,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 02:33:00,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-13 02:33:00,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [170185066] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:00,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:00,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22, 21, 9] total 43 [2021-11-13 02:33:00,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072095268] [2021-11-13 02:33:00,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:00,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 02:33:00,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:33:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 02:33:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1664, Unknown=4, NotChecked=0, Total=1806 [2021-11-13 02:33:00,960 INFO L87 Difference]: Start difference. First operand 299 states and 415 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 02:33:02,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:02,127 INFO L93 Difference]: Finished difference Result 505 states and 706 transitions. [2021-11-13 02:33:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:33:02,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 147 [2021-11-13 02:33:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:02,131 INFO L225 Difference]: With dead ends: 505 [2021-11-13 02:33:02,132 INFO L226 Difference]: Without dead ends: 304 [2021-11-13 02:33:02,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=158, Invalid=1908, Unknown=4, NotChecked=0, Total=2070 [2021-11-13 02:33:02,135 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 11 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.16ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:02,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1415 Invalid, 200 Unknown, 0 Unchecked, 5.16ms Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 504.78ms Time] [2021-11-13 02:33:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-13 02:33:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-11-13 02:33:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 185 states have (on average 1.135135135135135) internal successors, (210), 193 states have internal predecessors, (210), 93 states have call successors, (93), 18 states have call predecessors, (93), 25 states have return successors, (127), 92 states have call predecessors, (127), 92 states have call successors, (127) [2021-11-13 02:33:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 430 transitions. [2021-11-13 02:33:02,171 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 430 transitions. Word has length 147 [2021-11-13 02:33:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:02,172 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 430 transitions. [2021-11-13 02:33:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 02:33:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 430 transitions. [2021-11-13 02:33:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 02:33:02,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:02,175 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:02,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:02,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-13 02:33:02,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:02,593 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1932525639, now seen corresponding path program 1 times [2021-11-13 02:33:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:33:02,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512501476] [2021-11-13 02:33:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:02,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:33:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:33:02,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:33:02,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:33:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 02:33:07,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 02:33:13,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:44,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 219 [2021-11-13 02:33:44,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 207 [2021-11-13 02:33:44,300 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-11-13 02:33:44,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 207 treesize of output 1 [2021-11-13 02:33:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:33:44,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:33:44,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512501476] [2021-11-13 02:33:44,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512501476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:44,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827507859] [2021-11-13 02:33:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:44,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:33:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:33:44,441 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:33:44,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 02:33:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 02:33:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 129 proven. 11 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 02:34:12,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-13 02:34:17,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827507859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:17,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934781596] [2021-11-13 02:34:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:17,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:17,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:17,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 02:34:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 02:34:19,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-13 02:34:26,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-13 02:34:29,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934781596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:29,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:34:29,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16, 11, 16, 10] total 59 [2021-11-13 02:34:29,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961775265] [2021-11-13 02:34:29,352 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:29,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 02:34:29,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:34:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 02:34:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3172, Unknown=5, NotChecked=0, Total=3422 [2021-11-13 02:34:29,356 INFO L87 Difference]: Start difference. First operand 304 states and 430 transitions. Second operand has 59 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 54 states have internal predecessors, (197), 15 states have call successors, (75), 11 states have call predecessors, (75), 15 states have return successors, (72), 8 states have call predecessors, (72), 15 states have call successors, (72) [2021-11-13 02:34:31,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:33,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:35,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:37,652 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:39,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:41,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:43,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:45,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:47,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:49,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:51,748 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:53,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:34:55,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:02,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:17,460 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:35:20,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:13,208 INFO L93 Difference]: Finished difference Result 709 states and 1013 transitions. [2021-11-13 02:36:13,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-13 02:36:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 54 states have internal predecessors, (197), 15 states have call successors, (75), 11 states have call predecessors, (75), 15 states have return successors, (72), 8 states have call predecessors, (72), 15 states have call successors, (72) Word has length 149 [2021-11-13 02:36:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:13,215 INFO L225 Difference]: With dead ends: 709 [2021-11-13 02:36:13,215 INFO L226 Difference]: Without dead ends: 473 [2021-11-13 02:36:13,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 826 SyntacticMatches, 21 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4332 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=1267, Invalid=11610, Unknown=5, NotChecked=0, Total=12882 [2021-11-13 02:36:13,222 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 379 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 187 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61325.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 7360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.23ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 3147 IncrementalHoareTripleChecker+Unchecked, 64932.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 1678 Invalid, 7360 Unknown, 0 Unchecked, 40.23ms Time], IncrementalHoareTripleChecker [187 Valid, 4011 Invalid, 15 Unknown, 3147 Unchecked, 64932.07ms Time] [2021-11-13 02:36:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-13 02:36:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 370. [2021-11-13 02:36:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 234 states have (on average 1.170940170940171) internal successors, (274), 245 states have internal predecessors, (274), 101 states have call successors, (101), 24 states have call predecessors, (101), 34 states have return successors, (158), 100 states have call predecessors, (158), 100 states have call successors, (158) [2021-11-13 02:36:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 533 transitions. [2021-11-13 02:36:13,265 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 533 transitions. Word has length 149 [2021-11-13 02:36:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:13,265 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 533 transitions. [2021-11-13 02:36:13,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 54 states have internal predecessors, (197), 15 states have call successors, (75), 11 states have call predecessors, (75), 15 states have return successors, (72), 8 states have call predecessors, (72), 15 states have call successors, (72) [2021-11-13 02:36:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 533 transitions. [2021-11-13 02:36:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 02:36:13,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:13,269 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:13,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:13,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:13,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:13,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:13,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -895484706, now seen corresponding path program 1 times [2021-11-13 02:36:13,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:13,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31987303] [2021-11-13 02:36:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:13,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:13,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:13,882 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:13,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c9f42c2-d406-48a1-9b9c-91ba52944a6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:36:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 2000 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 02:36:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 170 proven. 12 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-13 02:36:23,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:37,281 WARN L227 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 523 DAG size of output: 269 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 02:36:37,285 INFO L354 Elim1Store]: treesize reduction 837, result has 46.8 percent of original size [2021-11-13 02:36:37,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 128 treesize of output 771